Method of forming bushing structures



June 12, 1928.. I 1,673,425

1-1. S CHWARTZ METHOD OF'FORMING BUSHING STRUCTURES Kf za 5a 57 MM 10 ly in the construction Patented June 12', 1928.

1,673,425 PATENT OFFICE- HENRY SCHWARTZ, OF CHICAGO, ILLINOIS.

METHOD OF FORMING BUSHING STRUCTURES.

Applica'tiouflled December 10, 1927. Serial No. 289,207.

This invention relates to the method of forming a bushing structure and has s ecial reference to the method for forming a ushing structure such as' is employed particularof metallic barrels and containers that are used for storing or shippin oils or other liquids or semi-liquids, the

usfling structure being provided to receive a hung or stopper in a fluid-tight assembly. More particularly this invention relates to j a new and novel method of forming a bushg structure comprising forming a flange at the periphery of an aperture in a barrel or other container, then inserting a threaded apertured body portion into the flanged portion and finally in dove-tailing the flan ed portion to secure the body portion rigi y and firmly in position.

In order to guard a ainst the unauthorized opening of the barre or container, this invention also relates to a method of forming a seal for the bung or stopper comprising bending a collar formed integrally withthe head blank;

- vention,

beforementioned flange" over a ring thereby holding the latter in an assembled relation with the bushing structure, the ring having a plurality of apertures therein t6 receive a sealing wire or string threaded through an aperture in a projection on a stopper or bung fitted into the bushing structure.

Further objects will hereinafter be referred to and fora better understanding of the nature, characteristics and scope of this inreference may be had to the accompany drawings and the following description, in which drawings:

Figure 1 is a. sectional view of a barrel Fig. 2 is a sectional view of a punch and die mechanism showing a flange being formed on the blank of Fig. 1;

Fig. 3 is a sectional view of another punch and die mechanism showing the body portion of the bushing structure inserted in the flanged portion of the blank and in position to receive the dove-tailing or crimping action of the die;

Fig. 4 is a view similar to Fig. 3 showing a changed position of the punch and die members wherein the flange is dove-tailed or crimped to retain the main body portion of the bushing structure;

Fig. 5 is the final operation showing the collar of the flange member being bent over 4 or crimped to receive a ring, the latter being an element of a sealing means and Fig. 6 is a vertical sectional view showing the completed bushin assembly.

Referring now to t e drawings, a head blank 10 is provided with an aperture 11 in any well known manner whereafter the blank is interposed between a punch 12 comprising an enlarged head 13 havin a polygonally shaped portion 14 of a smal er dia eter extending ownwardly therefrom; the polygonally shaped portion 14 having a. preferab y annular rojection 15 formed thereon of a. smaller iameter.

A die 16 is provided with an annular aperture at the lower ortion thereof of a diameter greater than tli projection 15 by the thickness of the material of the barrel head blank 10. The upper portion of the die 16 is provided with a polygonally shaped aperture 18 of a diameter greater than the diameter of the polyggonally shaped portion 14 of the die 12 the thickness of the material of the bla 10. An annular recessed portion 19 is formed in the shoulder provided at-the junction of the enlarged head portion 13 and the polygonally shaped portion 14 to receive an annular rid e 20 formed on the upper surface of the-die 16 adjacent the ed e of the polygonally shaped aperture 18.

he punch and die mem ers 12 and 16, respectively formed flanged portions on the barrel head from material surrounding the aperture 11. These flanged ortions are of two different diameters the flanged portion of the larger diameter being of a po ygonal contour and the flanged portion of the smaller diameter bein preferably annular. Further, an annular headed portion is formed on the supporting wall or blank 10 surrounding the polygonally shaped flanged portion for a definite purpose as will hereinafter be pointed out.

The barrel head is next placed on a die member preferaby comprising a plurality of segments 21 pivotally mounted on a supportin structure 22, one segment being requlred for each side of the polygonally sha ed flanged ortion. The segment 21 pre erably extends the full width of each side of the flange and is held in an up. position, as shown particularly in Fig. 3, by means of spring pressed plungers 23, the plungers extending through and being su ported by the supporting structure 22. 11 order to limit the upward movement of the barrel I e diameter of the annular tion is disposed 1n the socket formed by .rel head from the inner portion of the conthe shoulder at the junction of the annular flange and the polygonally shaped flange. This socket is formed outwardly on the bartainer. The opposite edges of the body portion '25, when viewed in cross section, converge inwardly toward the interior of the barrel provided that the flange is com prised'of an even number of sides. How-. ever, if an uneven number of sides is provided, any two sides when viewed together in cross section will converge inwardly, that is, toward the interior of the barrel.

By referring now to Fig. 4 of the drawing, it will be seen that .the segments 21 are moved inwardly by .a punch member 26 whereby the segments 21 have been pivoted to a position such that the diameter between the diametrically opposite upper edge portions of the engaging face 25 is smaller than the diameterbetween the corresponding uppemedge p0 ions ofthe engaging face 25 in Fig. 3. By reason of the taper o the engaging face 25, the polygonally shaped flan e is crimped inwardly againstthe inwar. y

converging edges of the bodyportion-and the material/of the beaded portion formed on the blank 10 adjacent the polygonally shaped ,flan e, is taken' up so that the supporting we 10 is flat. The main body portion is now held in a firm assembled relation inthe polygonally shaped socket.

A ring 27, having'apertures 38 formed therein, is inserted around the annular flange extending from the polygonally shaped socket and the barrel head 10 is then interposed between a punch member 29 and a die member 30. The actuation of the punch and die members forms the annular flange ing structure is shown wherein an internally threadedpolygonally shaped body portion is secured in-a socket extending outwardly from a barrel head. When this bushing structure is viewed in cross section, the outer edges thereof converge inwardly, that is, to-' ward the interior of the barrel or container. The side walls of the socket are formed against these inwardly converging edges of the main body portion and force the latter against a shoulder at the junction of the annular flange and these side Walls. The annular flange holds the ring 27 in a secure relationwith the bushing structure. How" ever, it may be desirable to dispense with the annular ring 27 Whereafter the annular portion 15 of the punch 12 and the annular aperture 17 of the die 16 may be dispensed with; therebymerely providing a shoulder formed integrally with the side walls of the socket.

While but a single embodiment of this invention is herein shown and described, it is to be understood that various modifications will be apparent to those skilled in the art without departing from the spirit and scope of this invention and it is desired,

therefore, that the same be limited .only by consisting of cutting a hole in a supporting wall thereof, forming an outwardly extending socket from the material adjacent said hole and a beaded portion adjacent the wall of said socket, fitting an internally threaded body portion in said socket, and thereafter forming the walls of said socket against inwardly converging edges of said body portion thus using up the material of said beaded portion.

2. A method of securing an annular internally threaded bushing in position with respect to an aperture in the sheet metal wall of a container, said bushing having its diameter adjacent its outer face greater than its diameter adjacent the wall of the container, which method comprises forming a collar from the sheet metal wall about said aperture, said collar extending outwardly from said wall and having an annular flange for the outer face of the bushing to lie against and said collar having a diameter large enough to permit the insertion of the bushing into said collar from the inside side of said wall. inserting said bushing into said collar fromthe inside side of the container Wall to bring its outer face against said flange, and exerting pressure on said collar from the outside side of said wall to contract said collar to cause it to fit snugly against said bushing.

3. A method of securing an annular internally threaded bushing in position with respect to an aperture in the sheet metal wall of acontainer, said bushing having its di-.

nevaaas ameter adjacent its outer face greater than its diameter adjacent the wall of the container,-wbich method comprisesmakmg an.

' openingjin said wall, forming a collar surroundi said openin saidcollar extending outfivar y from sai wall andhavin an annular e for the outer face 0 bushing to he against said diameter lar enough to 't insertion o the bushing into the collar from the inside side of said collar, forming an inwardl .efzrten [,s'iirr'o'un said collar resulting in a bead onthe insideside of sai wall, inserting said F bushing into said collar fromv the inside side of the container wall to bring its outer face against said flange and exerting re on said collar" from the outside side of said collar to straighten out said annular corru- 0 gation and to contract said'collar to cause it to fit snugly against said bushing. 4. The method of forming a hushin struc- '.'.ture for metallic barrels and the e consisting of cutting a hole in a sufiporting wall :5 thereof forming. an .outwar y extendin the collarhaving a collar om the, material about said hole an a flan on said collar, fittin an internally three ed. bod portion in sai' collar where by the'face t ereoirestsjgainst said flange,-

lo and thereafter forming said collar portion at f threaded polygonally annular corrugation in said wal l" snugly against the outer side walls of said bushin in a securing relation therewith.

-5. e method of forming a bushing structure for metallic barrels and the like consisting of cutting a hole in a. supporting wall thereof, forming a polygonally shaped collar from the material abou said hole and on said collar, fittin an internally sha body portion in said collar whereby the face thereof rests against said flange and thereafter forming said collar portion snugly against side walls of lati'on therewith.

6. The method of forming a b structure for metallic barrels and the l' econsisting of cuttinga hole in a supporting wall thereof, forming a collar from the material about said hole and a flan on .said collar fitting an internally three of a non-circular contour in said whereby the face of said body against said flange, and therea r forming said collar portion snugly against inwardly converging outer side walls of said bushing whereby a securing means of a dove-tel cross section is obtain P In witness whereofll have hereunto subscribedmy name. 7 v

' HENBYSQHWABTZ' collar the'outer' said bushing in a securing'reed body portion rtion rests 

